Center ledge scoop with means resisting forcible mis-meshing



Dec. 2, 1958 H. MORlN 2,362,272

' CENTER LEDGE SCOOP WITH MEANS RESISTING FORCIBLE MIS-MESHING FiledJuly 8, 1955 INVENTOR. LOUIS H. MORIN 1 ATTORNEY United States Patent GCENTER LE'DGE SCOOP WITH'MEANS RESISTING FORGIBLE' MIS MESI-IIN G LouisH. Morin, Bronx, N. Y. Application July 8, 1955, Serial No. 520,780 2Claims. (Cl. 24-20543 This invention relates to the production ofseparable fastener stringers employing scoops mounted on beaded edgeportions of the stringer tapes. More particularly, the invention dealswith fasteners of the character described, wherein the scoops are of thecenter ledge type. Still more particularly, the invention deals with ascoop structure, wherein one side or plane only of the scoop includesmeans for coupling the scoops against lateral separation and the other,or back plane, is fashioned to form a substantially more or lessrectangular member for resisting twisting or other forcible mismeshingof the scoops while, at the same time, simplifying production of scoopsof the kind under consideration. This application is acontinuation-in-part of application Serial No. 307,279, filed August 30,1952 which issued on July 9, 1957 as Patent N0. 2,798,274.

The novel features of the invention will be best understood from thefollowing description, when taken together with the accompanyingdrawing, in which certain embodiments of the invention are disclosedand, in which, the separate parts are designated by suitable referencecharacters in each of the views and, in which:

Fig. 1 is an enlarged plan view of a small portion of a pair ofseparable fastener stringers coupled together with my improved scoops.

Fig. 2 is a section on the broken line 22 of Fig. 1; and

Fig. 3 is a perspective view of one of the scoops detached.

In Figs. 1 and 2 of the drawing, I have shown at and 11 a pair ofstringers, on the beaded edges 10, 11' of which are secured scoops 12,12. As the scoops 12, 12' are both of the same construction, the briefdescription of one will apply to the other.

Each scoop is of the center ledge type and has an upper coupling part 13and a back part 14, substantially rectangular in form and producing themember for resisting forcible mismeshing of the scoops. Each part 13, 14includes a mounting end portion 15, 16, respectively, engaging thebeaded edge of the tape, as clearly noted in Figs. 1 and 2 of thedrawing.

The upper coupling part 13 forms the coupling end portion of the scoopand has a more or less diamondshaped coupling head 17, the walls ofwhich are bevelled upwardly, as diagrammatically shown. head 17 is acoupling neck or recessed female coupling portion 18 for reception ofthe heads 17 of the scoops of the companion stringer, in the mannerclearly noted in Fig. 1 of the drawing.

The back part or member 14, including the mounting end portion 16thereof, is of one common width with the mounting end portion of theupper part 13, thus substantially triangular ledges 19 are provided inalignment with the necks 18, so as to receive the opposed protrudingcorner portions 20 of the heads 17 of the scoops of a companionstringer, as noted in Fig. 1 of the drawing.

The lower surface 21 of the upper coupling part 13 is Inwardly of theslightly tapered in an upward and outward direction, so as to insurefree coupling engagement of the scoops one with the other in couplingthe stringers 10 and 11 together. The lower surface 21 has, centrallythereof, a protruding rounded bead 22, which serves to reinforce thehead 17, this fibead further facilitating flow of the heated material tothe cavity in forming the scoop and, particularly, the back part 14thereof.

It will be apparent that the scoops 12 are die. cast or moulded and,from this standpoint the casting or moulding operation is materiallysimplified in providing the rectangular back part or member 14. Thissimplification is also due to simplifying the die construction forproducing the resulting scoop.

It will appear from a consideration of the drawing that the uppersurface 23 of the top part 13 is substantially parallel to the lowersurface 24 of the back part 14. It will also be noted that the outersurface 25 of the back part is substantially at right angles to thesurface 24. The surfaces 25 of the scoops are in close proximity to eachother when the scoops are coupled together and, for purposes ofdescription, I have applied the reference character 25 to the surface 25of the scoop 12', as shown in Fig. 2. It will thus be apparent that, inattempting to twist, sharply bend or otherwise deform the stringers inan effort to forcibly mismesh or separate the scoops, the surfaces 25,25' will be brought into abutting engagement with each other; thuschecking this stress or strain. It will also be understood that, insharply bending coupled stringers transversely across the stringers,surfaces of the parts 14, adjacent each other on each stringer, will bebrought into abutting engagement, checking this stress or strain.

With scoop structures of the kind defined, it will be apparent that thecoupling engagement between scoops of a pair of stringers is establishedsolely through the upper part 13 of the scoops 12, 12'; whereas, thebottom part employing the rectangular parts 14 establish no couplingengagement whatever between the scoops but simply function as blockingor checking members, which abut one another in preventing separation ofthe stringers when subjected to different stresses, bendings or strains.The adjacent surfaces 25, 25 are so arranged that this surface of onescoop engages corresponding surfaces of two adjacent scoops of acompanion stringer. This will be apparent from a consideration of Fig. lof the drawing.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. A scoop for separable fastener stringers of the class described,having upper and back parts, each including mounting end portionsarranged upon the beaded edge of a stringer tape in securing the scoopto said tape, the upper part having a coupling end portion extendingbeyond the edge of the tape bead and comprising male and female couplingportions facilitating coupling engagement of scoops of companionstringers in retaining the stringers against pull-apart separation, theback part having an outwardly projecting member, including ledge sidesoverlying the female coupling portion of the upper part to engage theheads of scoops of a companion stringer in further retaining the scoopsagainst separation, said member of each scoop having a wideperpendicularly straight outer surface, the coupling end portion of thescoop of one stringer overlying the complemental ledge surfaces of apair of scoops of a companion stringer, when said stringers are coupledtogether, to provide means, on coupled scoops, to resist forciblemismeshing, and the lower surface of the coupling end portion of theupper part being bevelled upwardly and outwardly.

2. A scoop for separable fastener stringers of the class described,having upper and back parts, each including mounting end portionsarranged upon the beaded edge of a stringer tape in securing the scoopto said tape, the upper part having a coupling end portion extendingbeyond the edge of the tape bead and comprising male and female couplingportions facilitating coupling engagement of scoops of companionstringers in retaining the stringers against pull-apart separation, theback part having an outwardly projecting member, including ledge sidesoverlying the female coupling portion of the upper part to engage theheads of scoops of a companion stringer in further retaining the scoopsagainst separation, said member of each scoop having a wideperpendicularly straight outer surface, the coupling end portion of thescoop of one stringer overlying the complemental ledge surfaces of apair of scoops of a companion stringer, when said stringers are coupledtogether, to provide means, on coupled scoops, to resist forciblemismeshing, the lower 4 surface of the coupling end portion of the upperpart being bevelled upwardly and outwardly, and having a centrallylongitudinally extending bead.

References Cited in the file of this patent UNITED STATES PATENTS2,331,618 Morin Oct. 12, 1943 2,355,996 Morin Aug. 15, 1944 2,394,211Stilf Feb. 5, 1946 2,526,600 Bolten Oct. 17, 1950 2,660,774 Heimann Dec.1, 1953 FOREIGN PATENTS 561,414 Germany Oct. 14, 1932 926,777 FranceOct. 10, 1947

